<?php

/**
 * 模拟HTTP请求
 * @param string $url
 * @param array $params
 * @param boolean $ispost 是否post请求
 * @param boolean $https 是否强制https请求
 * @return boolean
 */
function HttpRequest($url, $params = false, $ispost = false, $https = null) {
    $httpInfo = array();
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
    curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.118 Safari/537.36');
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);
    curl_setopt($ch, CURLOPT_TIMEOUT, 30);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    if (!isset($https) && stripos($url, 'https') !== false) {
        $https = true;
    }

    if ($https) {
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE); // 对认证证书来源的检查
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE); // 从证书中检查SSL加密算法是否存在
    }
    if ($ispost) {
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $params);
        curl_setopt($ch, CURLOPT_URL, $url);
    } else {
        if ($params) {
            if (is_array($params)) {
                $params = http_build_query($params);
            }
            curl_setopt($ch, CURLOPT_URL, $url . '?' . $params);
        } else {
            curl_setopt($ch, CURLOPT_URL, $url);
        }
    }

    $response = curl_exec($ch);

    if ($response === FALSE) {
        //echo "cURL Error: " . curl_error($ch);
        return false;
    }
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    $httpInfo = array_merge($httpInfo, curl_getinfo($ch));
    curl_close($ch);
    return $response;
}

/**
 * 获取随机字符串
 * @param number $length 长度
 * @param string $type 类型
 * @param number $convert 转换大小写
 * @return string 随机字符串
 */
function wxRandom($length = 6, $type = 'string', $convert = 0) {
    $config = array(
        'number' => '1234567890',
        'letter' => 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ',
        'string' => 'abcdefghjkmnpqrstuvwxyzABCDEFGHJKMNPQRSTUVWXYZ23456789',
        'all' => 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890'
    );

    if (!isset($config[$type]))
        $type = 'string';
    $string = $config[$type];

    $code = '';
    $strlen = strlen($string) - 1;
    for ($i = 0; $i < $length; $i++) {
        $code .= $string{mt_rand(0, $strlen)};
    }
    if (!empty($convert)) {
        $code = ($convert > 0) ? strtoupper($code) : strtolower($code);
    }
    return $code;
}

/**
 * 输出xml字符
 * */
function ArrayToXml($values) {
    if (!is_array($values) || count($values) <= 0) {
        return false;
    }
    $xml = "<xml>";
    foreach ($values as $key => $val) {
        if (is_numeric($val)) {
            $xml .= "<" . $key . ">" . $val . "</" . $key . ">";
        } else {
            $xml .= "<" . $key . "><![CDATA[" . $val . "]]></" . $key . ">";
        }
    }
    $xml .= "</xml>";
    return $xml;
}

/**
 * 将xml转为array
 * @param string $xml
 */
function ArrayFromXml($xml) {
    if (!$xml) {
        return false;
    }
    //将XML转为array
    //禁止引用外部xml实体
    libxml_disable_entity_loader(true);
    $values = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
    return $values;
}
